<template>
  <div>
    <div :id="id" :class="className" :style="{height:height,width:width}" />
    <el-card v-if="connectVisible" style="width:500px;position: fixed;right: 10px;top: 10px;z-index: 9999">
      <div slot="header" class="clearfix">
        <span>卡片名称</span>
        <el-button style="float: right; padding: 3px 0" type="text">操作按钮</el-button>
      </div>
      <div v-for="o in 4" :key="o" class="text item">
        {{ '列表内容 ' + o }}
      </div>
    </el-card>

  </div>
</template>

<script>
import echarts from 'echarts'
import resize from './mixins/resize'

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    id: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '600px'
    },
    height: {
      type: String,
      default: '600px'
    }
  },
  data() {
    return {
      chart: null,
      connectVisible: false
    }
  },
  mounted() {
    this.initChart()
    var _this = this
    this.chart.on('mouseover', function(params) {
      _this.connectVisible = true
      // console.log(params);
    })
    this.chart.on('mouseout', function(params) {
      _this.connectVisible = false
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart: function() {
      this.chart = echarts.init(document.getElementById(this.id))
      this.chart.setOption({
        title: {
          text: '人口比例',
          x: 'center'
        },
        tooltip: {
          trigger: 'item',
          formatter: '{a} <br/>{b} : {c} ({d}%)'
        },
        series: [
          {
            name: '访问来源',
            type: 'pie',
            radius: '55%',
            center: ['50%', '60%'],
            data: [
              { value: 335, name: '直接访问' },
              { value: 310, name: '邮件营销' },
              { value: 234, name: '联盟广告' },
              { value: 135, name: '视频广告' },
              { value: 1548, name: '搜索引擎' }
            ],
            itemStyle: {
              emphasis: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      })
    }
  }
}
</script>
